I face with that error on 19c version on Windows operating system. Alertlog has below error messages:

ORA-27300: OS system dependent operation:write failed with status: 5
ORA-27301: OS failure message: Access is denied.
ORA-27302: failure occurred at: sskgmsmr_11

After investigate issue I have found below explanations

This issue is addressed in Bug 14677244 – SYSTEST: ORA-27300 & ORA-27301 & ORA-27302

Setting threaded_execution = TRUE is not supported on Windows platform, Set threaded_execution back to false by using below syntax:

alter system set threaded_execution=false;